All-metal bobbin



Jan 12 19260 L. A. CADORET ALL METAL BOBBIN Filed May 25, 1925 Patented Jan. 12, 1926.

LOUIS ALEXANDRE CADORET, 01: PAWTUCKET, RHODE ISLAND.

ALL-METAL BOBBIN.

Application filed m 25, 1925 Serial No. 32,789.

1 0 all whom it may concern:

Be it known that I, LOUIS A. Cmoim'r, a citizen of the United States, residing at Pawtucket, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in All- Metal Bobbins; and I do declare the following to be a full, clear, and exact description of the invention, such as enable others skilled in the art to which it appertains to make and use the same.

Alui'ninum and other comparatively soft, light metals are very desirable for the manufacture of shuttle bobbins, .such as those used in looms, but when constructing bobbins of such soft metals, it has been found that they are often seriously damaged when repeatedly engaged with and disengaged from bobbin-holding means of the shuttlesin which they operate. To overcome this difiiculty, I am aware that hard metal rings have been snapped into grooves around the head of a soft metal bobbin, in the same manner as such rings are commonly snapped into grooves in wooden bobbins. While this produces a construction somewhat better than a bobbin formed entirely of soft metal, the rings very often snap out of the grooves and cause trouble. It is the object of my invention however to provide a new and improved type of all metal bobbin, in which the portion for engagement with bobbinholding means of a shuttle is formed as part of a hard metal band which is continuous throughout its circumference from any point on such circumference, and in which the soft metal bobbin body has its head portion cast directly in said band to form therewith a unitary all-metal article,

in which the hard and soft metal portions are tenaciously secured together,- and cannot become accidentally separatedu W ilh the foregoing in .view, the invention resides in the novel subject matter hereinafter described and claimed, the description being supplemented by the accompanying drawing.

Figure 1 is a longitudinal sectional view showing one form of bobbin-constructed in accordance with my invention.

Figure 2 is a transverse section on line 2-2 of Fig. 1. I

Figure 3 is a view similar to Fig. 1 but showing a slightly different form of con- 1 struction.

"will Figure 4 is a fragn'ientary side elevation partly broken away and in. section showing a still further form of the improved bobbin. Figure 5 is a transverse sectional view on line of Fig. 4.

Figure (3 is a fragmentary longitudinal section, partly in elevation, showing yet another form of construction.

F igure 7 is a transverse sectional view on line 77 of Fig. 6.

In the drawing above briefly described, the numerals 1 each designate a hard metal band which is preferably formed of steel, said band being continuous throughout its circumference from any point on said circumference. Each numeral 2 refers to a soft metal bobbin body whose head portion 3 is east directly within the band 1, a diecasting process being preferably employed in the formation of the bobbin body. By

' thus casting the head portion of the bobbin body directly in the hard metal band 1, a unitary all-metal article is provided in which the hard and soft metal portions are tenaciously secured together and cannot become accidentally separated. The hard metal band is in all instances suitably shaped on its exterior to engage bobbinholding means of an ordinary or an automatic shuttle, as occasion may demand.

In the form of construction shown ir Figs. 1 and 2, the band 1 is laterally distorted on a plurality of circumferential lines, to simultaneously provide it with ril and groove formations 4 and 5 respectively the rooves being disposed at the interim of the band and the ribs at the exteriol thereof, and it will be observed from Fig 1, that the soft metal forming the head oi the bobbin body, fills the grooves and en gages the sides thereof which face sub stantially toward opposite ends of the bob bin. Thus, the band is positively helt against any endwise movement whatever It will of course be understood that the ex ternal ribs 4 are adapted to engage con ventional bobbin-holding means of a shut tle.

In the construction disclosed in Fig. 3 the details are the same as those describe in connection with Figs. 1 and 2, with th exception that the ribs 4: of the band l-ar on the interior thereof and the grooves 5 at the exterior. These ooves are intendei to engage bobbin-hol means of th shuttle, and it will be seen that as the set metal of the head 3 engages oppositesides of the ribs l, the band 1 is efficiently 'locked against endwise movement.

In Fig. 4, the band 1 is comparatively narrow and instead of having a plurality of ribs and grooves, it is formed only with one rib 4;" and with-one groove 5", and at one side of this groove which is disposed externally, the band 1 is longitudinally corrugated as at 6', so as to prevent slipping of the end of the thread or yarn when it is being wound upon the bobbin.

In the construction of Figs. 6 and 7 the band 1. is provided with two internal ribs 4. and with two external grooves 5, and between these grooves, said band is longitudinally corrugated as at 7 to engage bobbinholding means. In addition to performing their respective functions at the exterior of the band 1, it will be seen that the corrugations :7, as well as those above described and disclosed at 6, assist in forming a tenacious bond between the band and the head portion of the bobbin body.

In the manufacture of any form of the invention, the method disclosed in my pending application, Serial No. 5350, filed January 28, 1925, is preferably employed, and at this point, it may be stated that certain subject matter claimed in the present application, was eliminated from the pending application just referred to, in response to a requirement for division between article and method claims.

Any fOrm of the invention hereindisclosed or in any'other 'form in which it may be produced, will be found to be very much more advantageous than the ordinary bobbins heretofore used, and attention may be directed to the fact that when aluminum and steel are used in the manufacture of the invention, the article produced is substantially as light as a combined wood and metal bobbin, yet it is much more durable. ,When wooden bobbins are subjected to dye liquor and steam, they are subjected to a swelling action, which of course does not exist with the present invention, well adapting the latter-for dyeing purposes. If deand soft sired, it may be provided with a multiplicity of dye and steam passages 8.

As excellent results are obtainable from the details disclosed, they may well be followed, but within thescope of the invention as claimed, numerous modifications may be made.

I claim 1. A bobbin comprising a one-piece hard metal band continuous throughout its circumference from any point on said circumference, and a cast soft metal bobbin body having an integral head portion cast directly in said band to form therewith a unitary all metal article in which the hard metal portions are tenaciously secured together, said band being adapted to engage bobbin-holding means of a shuttle.

A structure as specified in claim 1; said-band having portions facing substantially toward opposite ends of the bobbin and abntted-by portions of the soft metal head to provide additional insurance against separation of the hard and soft metal portions of the bobbin.

3. A bobbin comprising a one-piece hard metal band continuous throughout its circumference from any point on said circumference, said band being laterally distorted on at least one circumferential line to simultaneously porvide it with rib and groove formations, one of said formations being disposed at the exterior of the band for engagement with bobbin-holding means of a shuttle and the other of said formations being disposed at the interiorof said band, and a cast soft metal bobbin body having an integral head portion cast directly in said band and in engagement with said distorted portion thereof, whereby said band and head portion are tightly and permanently secured together to provide a unitary all metal article.

4. A structure as specified in claim 1; said band having a plurality of circumferentially spaced longitudinal corrugations.

In' testimony whereof I have hereunto affixed my signature.

LOUIS ALEXANDRE CADORET. 

